Java设计模式-抽象工厂模式

抽象工厂模式，提供了一个创建一些列相关或相互依赖对象的接口，而无需指定它们具体的类

// User实体类
public class User {
    private int id;
    private String name;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }
}

// Department实体类
public class Department {
    private int id;
    private String name;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }
}

// IUser 接口
public interface IUser {
    void insert(User user);
    User getUser(int id);
}

// IUser 实现类 SqlserverUser
public class SqlserverUser implements IUser{
    @Override
    public void insert(User user) {
        System.out.println("Sqlserver 向User增加一条数据");
    }

    @Override
    public User getUser(int id) {
        System.out.println("Sqlserver 根据ID得到User一条数据");
        return null;
    }
}

// IUser实现类AccessUser
public class AccessUser implements IUser{
    @Override
    public void insert(User user) {
        System.out.println("Access 向User增加一条数据");
    }

    @Override
    public User getUser(int id) {

        System.out.println("Access 根据ID得到User一条数据");
        return null;
    }
}

public class AccessDepartment implements IDepartment{
    @Override
    public void insert(Department user) {
        System.out.println("Access 向Department增加一条数据");
    }

    @Override
    public Department getDepartment(int id) {
        System.out.println("Access 根据ID得到Department一条数据");
        return null;
    }
}

public class SqlserverDepartment implements IDepartment{
    @Override
    public void insert(Department user) {
        System.out.println("Sqlserver 向Department增加一条数据");
    }

    @Override
    public Department getDepartment(int id) {
        System.out.println("Sqlserver 根据ID得到Department一条数据");
        return null;
    }
}

public interface IFactory {
    IUser createUser();
    IDepartment createDepartment();
}

public class SqlserverFactory implements IFactory {
    @Override
    public IUser createUser() {
        return new SqlserverUser();
    }

    @Override
    public IDepartment createDepartment() {
        return new SqlserverDepartment();
    }
}

public class AccessFactory implements IFactory {
    @Override
    public IUser createUser() {
        return new AccessUser();
    }
    @Override
    public IDepartment createDepartment() {
        return new AccessDepartment();
    }
}

public class Main {
    public static void main(String[] args) {
        User user = new User();
        Department department = new Department();

        IFactory factory = new AccessFactory();
        IUser iu = factory.createUser();
        iu.insert(user);
        iu.getUser(1);
    }
}